It All Came From Pencils 2

Geometry Level 1

Hazri prepared another two pencils and he aligned them as shown in the diagram above.

The two pencils form an angle which is labelled yy (ACD\angle ACD) in the diagram. If the angle of the pencil tip AA is 4040^\circ and the angle of the pencil tip ECDECD is 3030^\circ, then what is the value of yy?

(Assume the pencils have a rectangular body and have their tips resembling isosceles triangles)

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